Himax Electric Power Combos.  This takes the guessing out of purchasing electric motors.  One package contains the motor, ESC, prop and prob hub, along with a recommendation for a battery pack. Performance of the system can be changed by altering the prop to suit the model if necessary.  We have found this package to be the best all around fit for the Crazy Thing.  Go GREEN, Go ELECTRIC. Why not consider E-Crazy Thing Combat!!!